Here is the full list of all 30 Hope Lake achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Emily is awaken!
Got out of the dead end
Piano keys found
Coffin lid lifted
Courtyard reached
Record found
Mix puzzle completed
Books puzzle completed
Hex tile found
The fire is put out
Sliding puzzle completed
Get into boarding school
Pipes puzzle completed
Disc puzzle completed
Case a lion head
Got the Valve :)
Took the flashlight
Handkerchief evidence found
Gas up the car
All special keys found
You got a revolver
Mystery of the painting solved
Escaped the trap
All evidence collected
Identified the mystery person
Animals puzzle completed
All photos found
The dragon defeated
Stopped Peter and saved Emily!
Telescope puzzle completed